hibernate

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版本：4.2.2

配置文件：hibernate.cfg.xml

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE hibernate-configuration PUBLIC          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <!-- Generated by eclipse Hibernate Tools.                   --><hibernate-configuration>    <session-factory>        <!--显示执行的SQL语句-->        <property name="show_sql">true</property>        <!--连接字符串-->        <property name="connection.url">jdbc:mysql://localhost:3306/hibernate</property>        <!--连接数据库的用户名-->        <property name="connection.username">root</property>        <!--数据库用户密码-->        <property name="connection.password"></property>        <!--数据库驱动-->        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>        <!--JDBC连接池（使用内置的连接池）-->        <!-- <property name="connection.pool_size">1</property> -->        <!--设置Hibernate自动管理上下文的策略-->        <!-- <property name="current_session_context_class">thread</property> -->        <!--选择使用的方言-->        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>        <!--在启动时删除并重新创建数据库 hibernate mapping data defination language(create/update/validate/create-drop)-->        <property name="hbm2ddl.auto">create</property>                <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>        <!-- 配置文件mapping --><!--               <mapping resource="events/Event.hbm.xml"/>        <mapping resource="events/Person.hbm.xml"/> -->        <!-- 注解mapping -->        <mapping class="com.basic.hibernate.model.Student"></mapping>    </session-factory></hibernate-configuration>

实体类：

annotation，注解一般加在get方法上，不加在成员变量上

@Entity@Table(name="student")public class Student {    private Integer id;    private String name;    private Integer age;    private String t;    private Date birthDate;    private Title title;        @Transient //该属性不存入数据库    public String getT() {        return t;    }    public void setT(String t) {        this.t = t;    }    @Id    public Integer getId() {        return id;    }    public void setId(Integer id) {        this.id = id;    }    @Column(name="name")    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    @Basic //没写时    public Integer getAge() {        return age;    }    public void setAge(Integer age) {        this.age = age;    }    @Temporal(TemporalType.TIME) //时间精度 value=TemporalType.TIME    public Date getBirthDate() {        return birthDate;    }    public void setBirthDate(Date birthDate) {        this.birthDate = birthDate;    }    @Enumerated(EnumType.STRING) //枚举类型    public Title getTitle() {        return title;    }    public void setTitle(Title title) {        this.title = title;    }}

Junit测试类

加junit jar包, 对象保存

public class StudentTest {    private static SessionFactory sf = null;        @SuppressWarnings("deprecation")    @BeforeClass    public static void beforeClass(){        sf = new Configuration().configure().buildSessionFactory();    }    @Test    public void testStudentSave() {        Student s = new Student();        s.setId(1);        s.setName("s1");        s.setAge(1);        s.setBirthDate(new Date());        s.setTitle(Title.high);                Session session = sf.openSession();        session.beginTransaction();        session.save(s);        session.getTransaction().commit();        session.close();                //fail("Not yet implemented");    }    @AfterClass    public static void afterClass(){        sf.close();    }}